I just needed the info for future reference - based on some other info i had gathered, the E53 is pre-wired in accordance with some other options present in a car... I personally do not need the PDC installation, as the 4.8is had the PDC factory installed... I am in process of installing some other items into the car - i got the factory TV and factory aspheric mirror already installed... other items are just novelties... http://www.xoutpost.com/bmw-sav-foru...done-list.html